1123311557 has 2 divisors, whose sum is σ = 1123311558. Its totient is φ = 1123311556.

The previous prime is 1123311503. The next prime is 1123311587. The reversal of 1123311557 is 7551133211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116161281 + 7150276 = 33409^2 + 2674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123311557 - 2⁶ = 1123311493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123311587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561655778 + 561655779.

It is an arithmetic number, because the mean of its divisors is an integer number (561655779).

Almost surely, 2^1123311557 is an apocalyptic number.

It is an amenable number.

1123311557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123311557 is an equidigital number, since it uses as much as digits as its factorization.

1123311557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 29.

The square root of 1123311557 is about 33515.8403892846. The cubic root of 1123311557 is about 1039.5213394564.

Adding to 1123311557 its reverse (7551133211), we get a palindrome (8674444768).

The spelling of 1123311557 in words is "one billion, one hundred twenty-three million, three hundred eleven thousand, five hundred fifty-seven".